가변속 AC 드라이브 시스템에 발생하는 누설전류와 서지전압의 억제

박진민(Jin-Min Park),이현우(Hyun-Woo Lee),김영문(Young-Mun Kim),문상필(Sang-Phil Mun),서기영(Ki-Yougn Suh) 대한전기학회 2004 대한전기학회 학술대회 논문집 Vol.2004 No.7

증례 : 급성골수성백혈병 환자에서 위 천공을 유발한 위모균증 1예

박진민 ( Jin Min Park ),강경미 ( Kyung Mi Kang ),김길선 ( Guil Sun Kim ),백정선 ( Jung Sun Bag ),송도선 ( Do Seon Song ),박종원 ( Chong Won Park ) 대한내과학회 2007 대한내과학회지 Vol.72 No.1S

증례 : 소화기 ; 다발성 용종으로 발현된 변연부 B세포 위 림프종

박진민 ( Jin Min Park ),전은정 ( Eun Jung Jeon ),김용철 ( Yong Cheol Kim ),김건민 ( Gun Min Kim ),이호상 ( Ho Sang Lee ),정대영 ( Dae Young Cheung ),김진일 ( Jin Il Kim ) 대한내과학회 2011 대한내과학회지 Vol.80 No.2S

변연부 B세포 림프종이 위에서 용종의 형태로 나타나는 경우는 매우 드물며 특히 다발성 용종의 형태로 발현된 경우는 보고되지 않았다. 국내에서는 다발성 용종 형태의 원발성 대장 변연부 B세포 림프종이 보고된 적이 있으나, 위에 국한되어 나타난 증례 보고가 없었다. 이에 저자들은 상부위장관 내시경상 다발성 용종 형태 의원발성 변연부 B세포 위 림프종으로 진단된 후 복합항암화 학요법을 시행하여 완전 관해를 이룬 1예를 경험하였기에 문헌고찰과 함께 보고하는 바이다. Marginal zone B-cell lymphoma of the gastrointestinal tract most commonly affects the stomach. Endoscopic findings of primary gastrointestinal lymphoma are various and heterogeneous. Lesions may appear as ulcers, erosions, or erythemas. Gastrointestinal lymphomas presenting as multiple polyps on endoscopy are rare. No case of marginal zone B-cell lymphoma manifesting as multiple polyps has been reported on the stomach, although a few cases have been reported in the colon. We present a rare case of a 77-year-old female patient diagnosed as primary gastric marginal zone B-cell lymphoma presenting as multiple polyps. She was fully treated by combination chemotherapy. (Korean J Med 2011;80:S73-S77)

수상레저스포츠 서비스품질이 고객만족과 재방문의도에 미치는 영향 : 플라이보드를 중심으로

박진민(Park, Jin-Min),한진욱(Han, Jin-Wook),이준희(Lee, Jun-Hee) 한국체육과학회 2021 한국체육과학회지 Vol.30 No.3

The purpose of this study was to examine the effect of service quality of water leisure sports, especially flyboard, on customer satisfaction and revisit intention. Toward this end, a total of 310 participants who had visited was conveniently selected and responded to survey questionnaire. 214 usable data were utilized in data analyses procedure including frequency analysis, descriptive analysis, confirmatory factor analysis, reliability analysis, and regression analyses. SPSS 23.0 and AMOS 22.O were used for data analyses. The results of this study were as follows. Firstly, tangibility and responsiveness had significant effects on customer satisfaction, but reliability, certainty, and empathy did not. Secondly, responsiveness was the only subfactor significantly affecting revisit intention, however the rest of sub-factors did not. Thirdly, it was found that customer satisfaction of water leisure sports had a positive effect on intention to revisit. Discussions and practical implications were also suggested.

종례 : 만성내장질환 환자에서 발생한 십이지장 및 공장의 허혈성 장염 1예

김건민 ( Gun Min Kim ),김용철 ( Yong Cheol Kim ),박진민 ( Jin Min Park ),홍석인 ( Seok In Hong ),김진일 ( Jin Ii Kim ),박수헌 ( Soo Heon Park ),김재광 ( Jae Kwang Kim ) 대한내과학회 2012 대한내과학회지 Vol.82 No.6

위장관 허혈은 내장동맥 협착, 혈전 및 저혈류 상태의 혈관수축에 의해 발생한다. 하지만 상부위장관에 동맥협착이 있다고 해도 풍부한 측부순환으로 허혈성 손상은 드물다. 저자들은 구토, 상복통 및 토혈을 주소로 내원한 92세 여자 환자를 경험하였다. 심전도에서 발작성 심방세동을 가지고 있었다. 환자는 상부위장관 내시경에서 십이지장 제2부에 미만성 분절형태의 점막 부종, 홍반 및 출혈을 보였다. 복부 혈관조영 전산화 단층촬영에서 복강동맥과 상장간막동맥의 협착이 있었고 십이지장 제2부의 근위 부부터 공장의 근위부까지 분절형 동심성 비대가 보였다. 환자는 일주일 동안 양전자 펌프 억제제 및 수액치료를 받았다. 추적 상부위장관 내시경에서 이전 검사에 비해 호전된 점막을 관찰할 수 있었다. 결론적으로 십이지장 및 근위부 공장은 혈액순환이 매우 풍부하여서 허혈성 손상이 발생하는 경우는 매우 드물지만 성내장질환을 가지고 있는 환자에서 유발인자로 인해 발생할 수 있다는 사실에 주의해야 한다. Gastrointestinal ischemia happens by splanchnic artery stenosis, thrombus, or physiological vasoconstriction during a low-blood-stream state. However, even if arterial stenosis exists in the upper gastrointestinal tract, ischemic injury is very rare due to rich collateral circulation. The authors experienced 92-year-old female patient with vomiting, epigastric pain, and hematemesis. An electrocardiogram showed paroxysmal atrial fibrillation. The patient had diffuse and segmental mucosal edema, erythema, and hemorrhage in the second part of the duodenum on esophagogastroduodenoscopy (EGD). On abdomen computed-tomography angiography, stenosis of the celiac and superior mesenteric arteries was observed, and segmental concentric wall thickness was seen from the proximal second portion of the duodenum to the proximal jejunum. The patient was treated with PPI and fluid therapy for one week. At follow-up EGD, the mucosa had improved compared with the previous EGD examination. In conclusion, ischemic injury rarely affects the duodenum and jejunum; however, it can develop in the presence of inducing factors.

호스피스 병동에서 시행되는 말기 암 환자의 DNR (Do-Not-Resuscitate) 동의

심병용,홍석인,박진민,조홍주,옥종선,김선영,한선애,이옥경,김훈교,Shim, Byoung-Yong,Hong, Seok-In,Park, Jin-Min,Cho, Hong-Joo,Ok, Jong-Sun,Kim, Seon-Young,Han, Sun-Ae,Lee, Ok-Kyung,Kim, Hoon-Kyo 한국호스피스완화의료학회 2004 한국호스피스.완화의료학회지 Vol.7 No.2

배경: 보편적으로 호스피스 병동에서 말기 암 환자에 있어서, DNR 동의가 흔하게 취득되고 있다. 그러나 말기 암 환자에 대한 현황과 실태 분석에 관한 국내 연구는 아직 드문 현실이다. 최근 저자 등은 보호자가 DNR 동의를 거부하여 심폐소생술 후 인공호흡기 치료를 시행하여 2개월 간 중환자실에서 치료 후 사망한 환자를 경험하면서 지금 까지 진행된 DNR 동의의 현 실태와 앞으로 시행될 DNR 동의의 보완점을 마련하기 위해 본 연구를 시작하였다. 방법: 2003년 1월부터 6월까지 6개월 동안 성빈센트병원 호스피스 병동에 입원한 말기 암 환자 60명을 대상으로 후향적으로 의무기록과 DNR 동의서를 조사하였다. 대상 환자들의 나이, 성별,진단명, DNR 동의 시간, 사망까지의 시간, DNR 동의에 참여한 보호자, DNR 결정 당시 환자 상태, 사망장소, DNR 결정 당시의 치료와 DNR 결정 전후 치료의 변화 등을 조사하였다. 치료 단계는 3단계로 분류하였다. 결과: 중앙 연령은 66세($31{\sim}93$세) 였고 남자가 31명, 여자가 29명이었다. 폐암 12명, 위암 12명, 담낭암 및 담도암 7명, 대장암 6명, 췌장암 4명, 기타 19명이었다. DNR 동의서에 서명한 사람은 아들이 22명, 배우자가 19명, 딸이 16명, 기타가 3명이었다. 이 중 환자가 DNR 동의서에 동의한 경우는 한 명도 없었다. 60명 중 30명이 입원 시에, 30명은 입원 기간 중에 DNR 동의서에 서명하였다. 입원 기간 중에는 증상의 악화 19명, 활력 증후 변화 4명, 다기관 기능부전 3명, 기타 상태 4명 등으로 DNR이 결정 되었다. DNR 동의 후 사망까지의 시간은 13명이 5일 이내에 사망하였다. 사망 장소는 60명 중 한 명을 제외하고는 모두 본원이었다. DNR이 시행되었을 당시 치료 단계는 2명을 제외하고 1단계였고 2단계와 3단계가 각각 1명씩이었다. 결론: 환자의 존엄성과 권리라는 측면에서 DNR 동의의 환자 참여가 국내에서도 신중하게 고려되어야 하겠다. 또 이를 위해 DNR 동의의 의미, 경과, 동의 철회 등의 사항이 포함된 문서화된 동의서에 의해서 환자와 보호자에게 설명되어야 하겠다. Purpose: DNR order is generally accepted for cancer patients near the end of life at Hospice Ward. It means not only no CPR when cardiopulmonary arrest develops but no aggressive meaningless medical interventions. Usually on admission, we discuss with the patients' family about DNR order at the Hospice Ward. Recently, we experienced a terminal lung cancer patient who had been on the ventilator for two months after pulmonary arrest. CPR and artificial ventilation were performed because patient's family refused DNR order. There is no consensus when, who, and how DNR order could be written for terminal cancer patients in Korea, yet. Methods: Hospice charts of 60 patients who admitted between Jan and Jun 2003 to Hospice Ward were reviewed retrospectively. Results: The median age was 66(range $31{\sim}93$) and there were 31 males and 29 females. Their underlying cancers were lung (12), stomach (12), biliary tract (7), colon (6), pancreas (4) and others (19). The persons who signed DNR order were son (22), spouse(19), daughter (16) and others (3). But, there was no patients who signed DNR order by oneself. Thirty families of 60 patients signed on day of admission and 30 signed during hospitalization when there were symptom aggravation (19), vital sign change (4), organ failure (3) and others (4). There were 13 patients who died within 5 days after DNR order. Most of patients died at our hospice ward, except in 1 patient. The level of care was mostly 1, except in 2 patients. (We set level of care as 3 categories. Level 1 is general medical care: 2 is general nursing care: 3 is terminal care.) Conclusion: We have to consider carefully discussing DNR order with terminal cancer patients in the future & values on withholding futile intervention.

입력전류 파형 개선형 단상 정류기의 토폴로지

이상현(Sang-Hyun Lee),박진민(Jin-Min Park),문상필(Sang-Pil Mun),서기영(Ki-Young Suh) 한국조명·전기설비학회 2003 한국조명·전기설비학회 학술대회논문집 Vol.2003 No.-

For small capacity rectifier circuits such as these for consumer electronics and appliances, capacitor input type rectifier circuits are generally used. Consequently, various harmonics generated within the power system become a serious problem. Various studies of this effect have been presented previously. However, most of these employ switching devices, such as FETs and the like. The absence of switching devices makes systems more tolerant to over-load, and brings low radio noise benefits. We propose a power factor correction scheme using a LC resonant in commercial frequency without switching devices. In this method, it makes a sinusoidal wave by widening conduction period using the current resonance in commercial frequency, Hence the harmonic characteristics can be significantly improved, where the lower order harmonics, such as the fifth and seventh order are much reduced. The result are confirmed by the theoretical and experiment implementations.

성빈센트병원에 입원한 암 환자에서 피로 유병율

송도선 ( Do Seon Song ),여창동 ( Chang Dong Yeo ),박진민 ( Jin Min Park ),손덕승 ( Der Sheng Sun ),황현석 ( Hyun Suk Hwang ),박신애 ( Shin Ae Park ),임윤선 ( Yun Sun Im ),심병용 ( Byoung Yong Shim ),김훈교 ( Hoon Kyo Kim ) 대한내과학회 2007 대한내과학회지 Vol.73 No.5

목적: 암 환자에서 피로는 흔한 증상임에도 연구가 많이 이루어져 있지 않고, 의료진도 관심이 적다. 또한 국내에서 이루어진 연구는 피로의 유병율에 대해서는 이루어진 것이 없다. 성빈센트 병원에 입원한 암 환자를 대상으로 암 환자의 피로의 유병율과 동반 증상들에 대해 알아보고자 하였다. 방법: 2006년 4월 4일, 11일, 18일, 성빈센트 병원의 암 병동과 호스피스 병동에 입원하고 있는 의식이 있는 환자 93명을 대상으로 성별, 나이, 기저질환, 피로를 느끼는지 여부에 대해 조사하였다. 피로를 느낀다고 대답한 환자를 대상으로 다른 동반 증상의 유무를 조사하였다. 결과: 대상 환자 93명 중 남자가 71명(76.3%), 여자는 22명(23.7%)이였으며 중앙 연령은 66세(범위 35~84세)였다. 기저 질환은 폐암(70%)이 가장 많았으며, 위암, 대장암, 담낭암, 췌장암 순이었다. 피로를 느낀다고 답한 환자는 30명(32.3%)이었으며 그 중 남자는 71명 중 20명(28.2%)이었고, 여자는 22명 중 10명(45.5%)으로 여자암 환자에서 피로의 빈도가 높았다. 피로도는 경증, 중등도, 중증이 각각 17명(56.7%), 6명(20.0%)과 7명(23.3%)이었다. 이들의 기저 질환은 폐암 환자가 21명(70%)으로 가장 많았으며, 대장암, 위암, 담낭암, 췌장암 순이었다. 피로를 느끼는 환자들의 치료내용은 항암요법 치료를 받는 환자가 14명(46.7%), 방사선 치료를 받는 환자가 6명(20%), 항암요법과 방사선치료를 동시에 받는 환자가 3명(10%), 완화요법을 받는 환자가 7명(23.3%)으로 항암요법을 받는 환자가 제일 많았다. 피로를 느끼는 환자들의 활동도는 ECOG 1, 2, 3에 해당되는 환자가 각각 10, 12, 8명이었으며 ECOG 4인 환자는 없었고, 활동도가 저하될수록 더 큰 피로를 느꼈다. 피로를 느끼는 환자에게 동반되는 증상으로는 통증이 17명(56.6%)으로 가장 많았고, 식욕부진, 수면장애, 불안, 우울증상, 탈수, 스트레스 등의 순으로 호소하였다. 이 중 통증을 Visual Analogue scale (VAS) 로 평가하였을 때 통증이 심할수록 피로도가 높았다. 피로를 느끼는 30명 중 28명에서 빈혈이 있었다. 피로도와 헤모글로빈 농도는 관계가 없었으며, 남자와 여자로 구분하여도 차이가 없었다. 결론: 의료진은 암 환자의 피로에 대해 관심을 가지고 피로와 연관된 동반 증상들에 대한 치료를 통해 피로도를 개선시키는 것이 필요하겠다. Background: Fatigue is one of the most common problems in terminally ill cancer patients in North America and Europe. However, fatigue has been almost neglected by health care professionals and even by patients and their families in Korea. We studied the prevalence and characteristics of fatigue in cancer patients who were admitted to St. Vincent`s Hospital. Methods: Ninety-three competent patients who were admitted to the cancer or hospice ward were asked to answer whether they had fatigue or other cancer related problems on three occasions on April 4, 11 and 18, 2006. Additional demographic data were also analyzed. Results: Thirty (32.3%) of the 93 patients responded that they had fatigue. The response was from 20/71 male and 10/22 female patients. The median age was 66 years (range 35-84 years). The ECOG performance status was 1, 2 and 3 in 10, 12 and 8 patients respectively. Lung cancer (21 patients) was the most common malignancy followed by gastric cancer, colon cancer and other cancers. Fourteen patients received chemotherapy, 13 patients received supportive care and 3 patients received chemoradiotherapy. Other cancer related symptoms were pain (17 patients), anorexia (16 patients), sleep disturbance (14 patients), and anxiety and depression. The severity of fatigue was grade 1, 2, 3 in 17, 6 and 7 patients respectively. Twenty-eight patients had anemia based on the WHO scale, and there was no relationship between the grade of fatigue and hemoglobin level. Conclusions: Fatigue was a frequent symptom in cancer patients (32%) and more frequent in female patients (45%). More attention needs to be paid to the significance of fatigue in cancer patients.(Korean J Med 73:512-518, 2007)

중·고등학교 축구 선수들의 스트레스요인에 관한 연구

강경빈,박동철,박진민 목포대학교 스포츠산업 연구소 2006 스포츠 산업연구소 논문집 Vol.5 No.-

This study was designed to make coaches of football teams in middle and high schools understand stressors of their athletes, build scientific and systematic training program, minimize negative damages of psychological factors and improve their competition. It examined stressors experienced by football players in middle and high schools, sought solutions, provide environment for voluntary participation in sports activities for improving quality of life as well as their competition and aimed to enhance development of their identity through self-realization. For the purpose of achieving these goals of research, it analyzed the following; first, difference in stress by school, second, difference in stress by grade, third, difference in stress by career, fourth, difference in stress by result or award, fifth, difference in stress by family income and sixth, difference in stress by position. This study selected 200 football players in 10 middle schools and 300 players in 4 high schools in Gwangju and Jeonnam regions as the subjects of research. It conducted questionnaire with these subjects using self-administered method and collected it there immediately. As a result of reliability analysis, it was found that game factor was .655, competition, .608, non-sports obstacles, .676, decision-making, .570, others’ expectation, .632, team cohesion, .679, training, .708, competition anxiety, .704 and family factors, .660. Data were processed with SPSS 11.0, frequency analysis was conducted for examining demographic characteristics, t-test was conducted to analyze difference in stress among athletes, one-way ANOVA was performed to verify differential of average values by grade, career, award, family income and position and significance level was set to a < .05. This study obtained the following conclusions through these research procedures. First, it was found that decision-making, team cohesion and family factors had a significant influence on stress by school. Middle school football players had more stress by decision-making and team cohesion than high school football players. High school football players had more stress by family factors than middle school football players. Second, all factors except training showed high responses in analysis of stress difference by grade and there were statistically significant influences in such factors as competition, exercise, non-sports obstacles and training. Middle school football players showed no significant difference in stress by grade, but showed higher difference in training factors by higher grade and it was because they were stressed by the problem of entering high school. High school football players were also influenced by stress in higher grades compared to lower grades. Third, there was statistically significant difference in training factor of stressors by career and players having career between over 3 years and below 5 years showed higher stress. Such factors as competition, non-sports obstacles and competition anxiety were highest in career between over 3 years and below 5 years and middle and high school students having higher career needed praise and encouragement including expectation. Fourth, there was statistically significant difference in non-sports obstacles of stressors by award and players who achieved semi-final results showed higher stress and it was found that middle and high school football players who had better skills and achieved good team results had higher stress. Fifth, players having family income below 2,000,000 won showed higher stress in all factors except decision-making. It meant that family income had np direct influence on competition, but players in fmily with higher income had even less stress than those with lower income. Sixth, FW and MF players showed higher stress in difference of stressors by position and GK showed lower stress. It meant that FW and MF players had more burden and stress in competition and game than GK players having less burden and stress in loss and competition.

ZVT-PWM 승압형 컨버터를 이용한 무전극 램프의 역률 개선

서기영,문상필,박진민,김주용 경남대학교 신소재연구소 2003 신소재연구 Vol.15 No.2

무전극 램프(EFC)의 전등은 램프 양단에 고주파를 갖는 고전압을 인가해야 한다. 종래의 무전극 램프의 구동 회로로 선형 증폭기가 이용되어져 왔으나, 낮은 에너지 변환 효율로 인해 PWM 스위칭 방식의 인버터로 교체되고 있다. 그러나 고주파 스위칭시 인버터의 스위칭 소자에서 스위칭 손실의 증가 및 노이즈 발생의 문제로 인해 PWM 인버터는 고주파 동작이 제한된다. 이러한 문제점을 해결하기 위해 영전압 스위칭 기술을 PWM 인버터에 적용하여 고주파 스위칭이 가능하고, 또한 스위칭 손실과 노이즈 발생을 줄일 수 있다. 본 논문에서는, 무전극 램프 구동용 인버터의 역률 개선 회로로서 이용될 수 있는 승압형 컨버터에 있어서 소형화 및 고전력 밀도에 큰 장점을 갖는 영전압 천이 PWM 승압형 컨버터에 관한여 서술하였다. 영전압 천이 PWM 승압형 컨버터의 정상상태 동작을 구간별로 해석하였으며, 이를 통하여 영전압 스위칭 조건을 도출하였다. 또한 이 컨버터를 무전극 램프 구동용 인버터의 역률 개선 회로에 적용, 실험을 하였으며 그 결과 0.99이상의 역률을 달성함을써 역률 개선 동작의 타당성을 입증하였다. Driving the electrodeless fluorescent lamp, the high AC voltage with high frequency is required. The linear power amplifier has been widely used as a driving circuit of electrode-less fluorescent lamp(EFL). However, the low efficiency of the power amplifier causes the driving circuit to be replaced by a PWM switching inverter. In other to use a PWM switching inverter as the driving circuit of an electrode-less fluorescent lamp, the high switching frequency is required But due to the switching loss at switches of the inverter, the limitation of high switching frequency appears in the inverter. One solution to this limitation is to reduce the switching loss by using the zero voltage switching technique. In this paper, an application of the ZVT-PWM(Zero-Voltage-Transition) boost converter, which has great advantage on mini-on and high power density, to the power factor correction circuit of the EFL(Eiectrode1ess Fluorescent Lamp) inverter i s studied. The operation principle of the converter are described to identify the power factor correction characteristics of the inverter. Experimentally obtaining the high power factor above 0.99, it is verified that the power factor correction of the EFL inverter successfully achieved.